K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2016-01-20T01:40:18.963529Z
K 7
svn:log
V 845
mkdep: Fix -include not being added for .depend tracking.

This fixes incremental build of OpenSSH after the recent upgrade.

For example, in secure/lib/libssh, -include ssh_namespace.h is used on
all files.  This is not tracked in the .depend file though due to
MKDEP_CFLAGS not including it.  The ssh example was broken in r291941
when not using FAST_DEPEND due to the .depend bug.  FAST_DEPEND was not
affected by this because it generates dependencies at compile time and
thus sees the -include.

This ugly make syntax could be simpler for bmake by using :tW but
fmake-compatible syntax is used since this needs to be MFC'd all the way
to stable/9.

Also add a temporary hack to workaround existing checkouts building
incrementally with a .depend file not having these headers.

MFC after:	1 week
Sponsored by:	EMC / Isilon Storage Division

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